4 weeks ago my husband ruptured his Achilles tendon and was put in cast for 12 weeks. I was recommended the Arc by a friend for him. Today he was back to have his cast changed and leg adjusted for the new cast, and was told that he had great recovery so far and only needs another 4 weeks in cast, so 8 weeks instead of 12 weeks. We can only put it down to the Arc we bought 3 weeks ago. Fab piece of kit!